بِسْمِ اللهِ ، تَوَكَّلْـتُ عَلى اللهِ وَلا حَوْلَ وَلا قُـوَّةَ إِلاّ بِالله
Bismillāhi, tawakkaltu `alallāhi, wa lā ḥawla wa lā quwwata illā billāh.
In the Name of Allah, I have placed my trust in Allah, there is no might and no power except by Allah.
Abu Dawud 4/325, At-Tirmidhi 5/490. See also Al-Albani, Sahih At-Tirmidhi 3/151